A Vendor Lock-In is when certain software is developed to be incompatible by design with other software that have similar functionality. It is used to establish a monopoly. And any such function is malicious.
This comment thread is for people to document various implementations of this malicious feature.
Directed by Richard Donner ( Superman, The Goonies ) from a script of Shane Black, Lethal Weapon is a film about cops. On the surface there is no concept to the movie what so ever. It is just simply a regular, straight forward police bromance. Yet somehow the movie moves.